BOOTHBAY HARBOR — Michael Johnson, with special guest John Gorka, will play a special concert celebrating the release of Moonlit Déjà Vu, his first new studio album in 15 years, at 8 p.m. Friday, July 5, at the Boothbay Harbor Opera House.

The concert also includes a very special guest appearance by Johnson’s newly found daughter Truly Carmichael.

Johnson never knew his daughter, who was adopted when she was four days old, but he knew she was out there. “I’d dream about her,” he said. “Sometimes I’d even picture her at my door at night.”

Twenty years ago, Johnson began looking for her, trying to reach her mother so that he could track her down. Making no progress, he let go of the search, saying that if it was supposed to happen, she would find him.

After spending his years in Nashville, Chicago, New York and Los Angeles, Johnson recently returned to Minnesota where he had lived from 1969 to 1985.

And then in August of 2009, he got an email from Carmichael, who was, of all things, a classically trained vocalist living in Minnesota.

“Go fig,” Johnson said. “It’s such a thrill to have her on this record. She was a ghost to me forever, and now here she is, singing like a bird.”

Singing together on the poignant original “One Mile Apart,” Johnson and Carmichael are the perfect voices for this duet about being close to someone and not even knowing it. Like that song, several tracks on the record remind Johnson of his daughter, including Hugh Prestwood’s “April Fool” and Charles Cochran and Roger Cook’s “Looking for Rainbows Without an Umbrella.”

He said, “It’s hard to explain why, but they evoked her long before we finally met. They were just her.” As he sings in “Looking for Rainbows,” “If the child in you prevails/And your common sense still fails you/You’re looking for rainbows, without an umbrella/That’s maybe the reason/I’m looking for you.”

Nostalgic and romantic, Moonlit Déjà Vu is a portrait of a man who has lived through fame and success as well as loss and illness. Now returning to his roots and reconnecting with his daughter, he reflects on his life in song.

With Johnson’s beautiful guitar playing and singing taking center stage, this new album has an intimate and authentic quality reminiscent of his riveting solo acoustic performances.

The Boothbay Harbor Opera House is at 86 Townsend Ave. Tickets are $22. For more information, call 207-633-5159 or visit www.boothbayoperahouse.com.